About Nexus

What is Nexus?

Nexus is a repository of freely available (see license below) network
data sets, to promote network science research and
education. Real-world data is essential for the testing of hypotheses
and the development of algorithms.

Ease of use

The principal aim of Nexus is make network data sets available with
the least effort possible from the user. You can download data that is
ready to use, in various
formats. We also provide an
API to allow importing data into
your analysis software directly and possibly programmatically. Nexus
is supported by the igraph
network analysis library, that you can use in your Python, R or
C/C++ programs.

We put an effort into carefully annotating the data sets and providing
the most complete possible meta-information within the data set
itself.

License

The different data sets are available
under different licenses,
please be sure to check the license of the particular data set you are
using. In general, all data sets are available for non-commercial
research and education purposes, provided you cite the appropriate
publications in your papers using them. Many data sets are available
for commercial use as well.

Donate data sets

A database without data is nothing. Please
consider sharing your data
sets to facilitate network science research. Not only will your
donation help other researchers and students, but it will also promote
reproducible research.

It is important, that if you donate your data, you still retain the
ownership and copyright on it. Obviously, you can also decide on the
terms of use for your data set.